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Because peptides typically break down quickly in the digestive tract, most are administered through injections
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"Perspective: Practical Approach to Preventing Subclinical B12 Deficiency in Elderly Population"
However, because B12 is stored in our livers, it might take a while for these deficiencies to show (Glass, 1959)
Interactions with Medications Vitamin B12 has the potential to interact with certain medications, including diabetic prescriptions, metformin, proton pump inhibitors, antagonists and antibiotics
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